''Desmophyllites'' is a small
desmoceratitid ammonite
Ammonoids are a group of extinct marine mollusc animals in the subclass Ammonoidea of the class Cephalopoda. These molluscs, commonly referred to as ammonites, are more closely related to living coleoids (i.e., octopuses, squid and cuttlefish) ...
characterized by a smooth and very involute shell that lived during the Santonian to Maachstrictian stages of the Late Cretaceous.
Shells of ''Desmophylites diphylloida'' from the upper Santonian are on order of 1.8 cm (0.7 in) in diameter. Those of ''Desmophylllites larteti'' from the upper Campanian are on order of 10.5 cm (~4 in) across.
References
* Arkell, et al, 1957. Mesozoic Ammonoidea,
Treatise on Invertebrate Paleontology
The ''Treatise on Invertebrate Paleontology'' (or ''TIP'') published by the Geological Society of America and the University of Kansas Press, is a definitive multi-authored work of some 50 volumes, written by more than 300 paleontologists, and co ...
, Part L (L370-371). Geological Society of America.
* ''Desmophyllites'' i
Desmoceratinae
{{Taxonbar, from=Q16466651
Cretaceous ammonites
Ammonites of Europe
Ammonitida